diff --git a/app/components/ProjectBrowserTree.jsx b/app/components/ProjectBrowserTree.jsx
new file mode 100644
index 00000000..73127332
--- /dev/null
+++ b/app/components/ProjectBrowserTree.jsx
@@ -0,0 +1,81 @@
+import R from 'ramda';
+import React from 'react';
+import classNames from 'classnames';
+import Tree from 'react-ui-tree';
+
+
+class ProjectBrowserTree extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {
+      active: null,
+      tree: props.tree,
+    };
+
+    this.onClickNode = this.onClickNode.bind(this);
+    this.onChange = this.onChange.bind(this);
+    this.renderNode = this.renderNode.bind(this);
+  }
+
+  componentWillReceiveProps(nextProps) {
+    if (nextProps.tree !== this.state.tree) {
+      this.updateTree(nextProps.tree);
+    }
+  }
+
+  onClickNode(node) {
+    const nodeRef = node;
+    if (!node.hasOwnProperty('leaf')) {
+      nodeRef.collapsed = !nodeRef.collapsed;
+    }
+
+    this.setState(R.assoc('active', nodeRef, this.state));
+  }
+  onChange(tree) {
+    this.props.onChange(tree);
+  }
+
+  updateTree(tree) {
+    this.setState(R.assoc('tree', tree, this.state));
+  }
+
+  bindOnClickNode(node) {
+    return this.onClickNode.bind(this, node);
+  }
+
+  renderNode(node) {
+    const nodeClassName = classNames('node', {
+      'is-active': node === this.state.active,
+      'is-current': (node.hasOwnProperty('leaf') && node.id === this.props.currentPatchId),
+    });
+
+    return (
+      <span
+        className={nodeClassName}
+        onClick={this.bindOnClickNode(node)}
+      >
+        {node.module}
+      </span>
+    );
+  }
+
+  render() {
+    return (
+      <div className="ProjectBrowserTree">
+        <Tree
+          tree={this.state.tree}
+          renderNode={this.renderNode}
+          onChange={this.onChange}
+        />
+      </div>
+    );
+  }
+}
+
+ProjectBrowserTree.propTypes = {
+  tree: React.PropTypes.object.isRequired,
+  currentPatchId: React.PropTypes.number,
+  onChange: React.PropTypes.func,
+};
+
+export default ProjectBrowserTree;
diff --git a/app/components/Sidebar.jsx b/app/components/Sidebar.jsx
new file mode 100644
index 00000000..2a44fc26
--- /dev/null
+++ b/app/components/Sidebar.jsx
@@ -0,0 +1,13 @@
+import React from 'react';
+
+const Sidebar = ({ children }) => (
+  <div className="Sidebar">
+    {children}
+  </div>
+);
+
+Sidebar.propTypes = {
+  children: React.PropTypes.arrayOf(React.PropTypes.element),
+};
+
+export default Sidebar;
diff --git a/app/containers/Editor.jsx b/app/containers/Editor.jsx
index f5b11c47..d99866b0 100644
--- a/app/containers/Editor.jsx
+++ b/app/containers/Editor.jsx
@@ -8,6 +8,7 @@ import * as KEYCODE from '../constants/keycodes';
 import { isInput } from '../utils/browser';
 import Patch from './Patch';
 import EventListener from 'react-event-listener';
+import Sidebar from '../components/Sidebar';
 import Inspector from '../components/Inspector';
 import ProjectBrowser from './ProjectBrowser';
 
@@ -74,13 +75,15 @@ class Editor extends React.Component {
     return (
       <div>
         <EventListener target={document} onKeyDown={this.onKeyDown} />
-        <ProjectBrowser />
-        <Inspector
-          selection={this.props.selection}
-          nodes={this.props.nodes}
-          nodeTypes={this.props.nodeTypes}
-          onPropUpdate={this.onPropUpdate}
-        />
+        <Sidebar>
+          <ProjectBrowser />
+          <Inspector
+            selection={this.props.selection}
+            nodes={this.props.nodes}
+            nodeTypes={this.props.nodeTypes}
+            onPropUpdate={this.onPropUpdate}
+          />
+        </Sidebar>
         <Patch
           size={this.patchSize}
         />
diff --git a/app/containers/ProjectBrowser.jsx b/app/containers/ProjectBrowser.jsx
index 9c5bcd98..7f2d5142 100644
--- a/app/containers/ProjectBrowser.jsx
+++ b/app/containers/ProjectBrowser.jsx
@@ -1,27 +1,45 @@
 import React from 'react';
 import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
-import * as Actions from '../actions';
+// import * as Actions from '../actions';
 import Selectors from '../selectors';
+import ProjectBrowserTree from '../components/ProjectBrowserTree';
 
 
 class ProjectBrowser extends React.Component {
   constructor(props) {
     super(props);
-    this.displayName = 'ProjectBrowser';
+
+    this.onTreeChange = this.onTreeChange.bind(this);
   }
+
+  onTreeChange(newTree) {
+    console.log('tree changed!', newTree);
+  }
+
   render() {
-    return <div>ProjectBrowser</div>;
+    return (
+      <div className="ProjectBrowser">
+        <small className="title">Project browser</small>
+        <ProjectBrowserTree
+          tree={this.props.tree}
+          currentPatchId={this.props.currentPatchId}
+          onChange={this.onTreeChange}
+        />
+      </div>
+    );
   }
 }
 
 ProjectBrowser.propTypes = {
+  tree: React.PropTypes.object.isRequired,
   actions: React.PropTypes.object,
   patches: React.PropTypes.object,
   currentPatchId: React.PropTypes.number,
 };
 
 const mapStateToProps = (state) => ({
+  tree: Selectors.Project.getTreeView(state),
   patches: Selectors.Project.getPatches(state),
   currentPatchId: Selectors.Editor.getCurrentPatchId(state),
 });
diff --git a/app/selectors/project.js b/app/selectors/project.js
index b12e0ef6..d80f7d32 100644
--- a/app/selectors/project.js
+++ b/app/selectors/project.js
@@ -596,3 +596,59 @@ export const getLinkGhost = (state) => {
     to: { x: 0, y: 0 },
   };
 };
+
+/*
+  Folders
+*/
+export const getFolders = R.pipe(
+  getProject,
+  R.prop('folders')
+);
+
+/*
+  Tree view (get / parse)
+*/
+export const getTreeView = (state) => {
+  const makeTree = (folders, patches, parentId) => {
+    const foldersAtLevel = R.pipe(
+      R.values,
+      R.filter(R.propEq('parentId', parentId))
+    )(folders);
+    const patchesAtLevel = R.pipe(
+      R.values,
+      R.map(R.prop('present')),
+      R.filter(R.propEq('folderId', parentId))
+    )(patches);
+
+    return R.concat(
+      R.map(
+        folder => ({
+          id: folder.id,
+          module: folder.name,
+          collapsed: true,
+          children: makeTree(folders, patches, folder.id),
+        }),
+        foldersAtLevel
+      ),
+      R.map(
+        patch => ({
+          id: patch.id,
+          module: patch.name,
+          leaf: true,
+        }),
+        patchesAtLevel
+      )
+    );
+  };
+
+  const folders = getFolders(state);
+  const patches = getPatches(state);
+
+  return {
+    module: 'Project',
+    collapsed: false,
+    children: makeTree(folders, patches, null),
+  };
+};
+
+// export const parseTreeView = (state) => {};
diff --git a/app/state.js b/app/state.js
index 9239e4e6..2c7e97d6 100644
--- a/app/state.js
+++ b/app/state.js
@@ -78,7 +78,8 @@ const initialState = {
       },
     },
     nodeTypes,
-    counter: {
+    folders: {},
+   counter: {
       patches: 1,
       nodes: 1,
       pins: 1,
diff --git a/app/styles/abstracts/mixins.scss b/app/styles/abstracts/mixins.scss
index d806743a..483f5f91 100644
--- a/app/styles/abstracts/mixins.scss
+++ b/app/styles/abstracts/mixins.scss
@@ -22,7 +22,7 @@
 @mixin inspector-widget() {
   padding: 4px;
   margin-bottom: 2px;
-  border-top: 1px solid #ccc;
+  // border-top: 1px solid #ccc;
   overflow: hidden;
 
   font-size: $font-size-m;
diff --git a/app/styles/abstracts/variables.scss b/app/styles/abstracts/variables.scss
index 0081507c..d4e7b74a 100644
--- a/app/styles/abstracts/variables.scss
+++ b/app/styles/abstracts/variables.scss
@@ -23,3 +23,13 @@ $color-ctrl-background: #2d4c29;
 $color-ctrl-background-text: #fff;
 
 $snackbar-width: 200px;
+$sidebar-width: 200px;
+
+$sidebar-background: #eee;
+$sidebar-color: #000;
+$sidebar-title-color: #999;
+$sidebar-title-divider: #ccc;
+$sidebar-selected-background: rgb(128, 160, 190);
+$sidebar-selected-color: #000;
+$sidebar-block-shadow: inset 0 5px 15px 1px rgba(0,0,0,.1);
+$sidebar-block-divider: 1px solid #fff;
\ No newline at end of file
diff --git a/app/styles/components/Inspector.scss b/app/styles/components/Inspector.scss
index 463470bf..ae2c9b74 100644
--- a/app/styles/components/Inspector.scss
+++ b/app/styles/components/Inspector.scss
@@ -1,16 +1,10 @@
 
 .Inspector {
-  position: absolute;
-  width: 200px;
+  display: block;
+  width: 100%;
   height: 100%;
-  background: #eee;
-  color: #000;
-
-  .title {
-    display: block;
-    padding: 26px 20px 4px 8px;
-    color: #999;
-  }
+  background: $sidebar-background;
+  color: $sidebar-color;
 
   ul {
     padding: 0;
diff --git a/app/styles/components/ProjectBrowserTree.scss b/app/styles/components/ProjectBrowserTree.scss
new file mode 100644
index 00000000..3a2b7025
--- /dev/null
+++ b/app/styles/components/ProjectBrowserTree.scss
@@ -0,0 +1,87 @@
+.ProjectBrowserTree {
+  width: $sidebar-width;
+  background: $sidebar-background;
+  color: $sidebar-color;
+  padding: 8px 0;
+
+  box-sizing: border-box;
+
+  * { box-sizing: border-box; }
+
+  .f-no-select {
+    -webkit-user-select: none;
+    -khtml-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
+  }
+  .m-tree {
+    position: relative;
+    overflow: hidden;
+    font-family: $font-family-normal;
+    font-size: $font-size-m;
+
+    -webkit-user-select: none;
+    -khtml-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
+  }
+  .m-draggable {
+    position: absolute;
+    opacity: 0.8;
+    -webkit-user-select: none;
+    -khtml-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
+  }
+  .m-node {
+    box-sizing: border-box;
+
+    &.placeholder {
+      border: 1px dashed $sidebar-selected-background;
+
+      & > * {
+        visibility: hidden;
+      }
+    }
+
+    .inner {
+      position: relative;
+      cursor: pointer;
+      padding-left: 12px;
+    }
+    .node {
+      display: block;
+      padding: 4px 6px;
+
+      &.is-active {
+        border-left: 100px solid $sidebar-selected-background;
+        border-right: 100px solid $sidebar-selected-background;
+        margin-left: -100px;
+        background: $sidebar-selected-background;
+        color: #006;
+      }
+    }
+    .collapse {
+      position: absolute;
+      left: 0;
+      padding: 2px 6px;
+      cursor: pointer;
+    }
+    .children {
+      display: block;
+    }
+
+    .caret-down:before {
+      font-size: $font-size-m;
+      content: '\25BE';
+    }
+    .caret-right:before {
+      font-size: $font-size-m;
+      content: '\25B8';
+    }
+  }
+
+}
\ No newline at end of file
diff --git a/app/styles/components/Sidebar.scss b/app/styles/components/Sidebar.scss
new file mode 100644
index 00000000..259acf7d
--- /dev/null
+++ b/app/styles/components/Sidebar.scss
@@ -0,0 +1,20 @@
+.Sidebar {
+  position: absolute;
+  width: $sidebar-width;
+  height: 100%;
+
+  background: $sidebar-background;
+
+  & > * {
+    box-shadow: $sidebar-block-shadow;
+    border-bottom: $sidebar-block-divider;
+  }
+
+  .title {
+    display: block;
+    margin: 0 8px;
+    padding: 10px 20px 4px 0;
+    color: $sidebar-title-color;
+    border-bottom: 1px solid $sidebar-title-divider;
+  }
+}
\ No newline at end of file
diff --git a/app/styles/main.scss b/app/styles/main.scss
index 35e9fe9e..2fa6d8d4 100644
--- a/app/styles/main.scss
+++ b/app/styles/main.scss
@@ -14,6 +14,7 @@
   'base/base';
 
 @import
+  'components/Sidebar',
   'components/PatchWrapper',
   'components/PatchSVG',
   'components/BackgroundLayer',
@@ -25,4 +26,5 @@
   'components/Inspector',
   'components/SnackBarList',
   'components/SnackBarError',
+  'components/ProjectBrowserTree',
   'components/CreateNodeWidget';
diff --git a/package.json b/package.json
index b95ef815..8b673cb6 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,7 @@
     "react-event-listener": "^0.2.1",
     "react-redux": "^4.0.6",
     "react-skylight": "^0.4.0",
+    "react-ui-tree": "^2.5.0",
     "redux": "^3.0.5",
     "redux-thunk": "^2.1.0",
     "redux-undo": "^1.0.0-beta8",